Cement-mixer.



No. 847,281. r PATENTED MAR. 12, 1907; J. A. DEVINE.

CEMENT MIXER.

APPLICATION FILED SBPT.26,1905.

front view with the drum in position for un- ATEN FEE CEMENT-MIXER.

Specification of Letters Patent.

Patented March 12, 190?.

Application filed September 26, 1905. Serial No. 280.192.

To all whom it may concern.-

Be it known that 1, JAMES A. DEVINE, a I citizen of the United States, residing at I Zanesfield, in the county of Logan and State I of Ohio, have invented a new and useful Imrovement in Ce miixers, of' which the ollowing is a sp cification My inventio relates to certain improve-- ments in ceme t-mixing machines.

Figure 1 is a perspective view of my device with the drum in position for filling. This fi ure shows the frame cutaway or built to allow the drum to revolve backward so chute C can be brought down to the loading-platform M below the axis ofthe drum, also showing my loading-platform M and box P, that contalns a gasolene-engine. Fig. '2 is a loading.

M designates a platform, which is suitably mounted on wheels both for transportation and so that it will'be above the ground, for a reasonhereinafter set forth. The said plat form has at its front end a suitable housing P for an engine or other motor and at its rear end has a recessed or cut-away ortion N, over which the drum or cylinder 1- is mounted. The said cylinder has its ends closed and its to onsidecut away oropen and is mounted oose'ly on an axle D, that is journaled in the frame E. On one end of axle D is a sprocket-wheel I to receive power through a chain from the engine to operate the mixingshovels a b c d. These mixing-shovels are adjustably arranged in series and secured on. four sides of the axle within the cylinder and all but one of, each series are curved like a plowshare and set at an inclination to turn and push the cement and gravel along as they move forward. One shovel a of each series isflat to lift thematerial up and drop itforward over the axle as it revolves, and these are arranged inv progressive steps around the axle, the fiat shovels a of the several series being in different horizontal rows. Each alternate series ofshovels pushes the i material in opposite dircctionsendwise while 1 turning it over. The cylinder H isprovided at the opposite sides of its ciit away portion with chutes C and O.

The operation of my device is as follows: The cylinder H is revolved until the chute O is an or just above latform M. The gravel 5 'iawheeled up onto t e platform and dumped l I into the cylinder and the cement sprinkled. in

with it. When the desired amount, usually three wheelbarrows full, are emptied into the cylinder, the machinery is started arid the material dry-mixed for one minute. The water is then thrown in without stopping the machinery, and the mass is then Inixe d for one minute in the wet state. Cylinder H is then revolved backward by hand or otherwise, and then shaft D is rotated until the shovels lift the material out and fill a wheelbarrow beneath the chute 0. When the first wheelbarrow is full and-the material is lowered in the cylinder, the cylinder is further revolved until the chute O is still further lowered and the shovels fill another wheelbarrow. The cylinder is still further revolved and the shovels scra e the remainder of the material into a wheel arrow. The cylinder is then re-- volved forward into position for other wheelbarrows to fill it again. The machine is a batch-mixer; but the process is almost con.- tinuous, the shovels revolving all the time. and the only time the machine is not mixing is when the cylinder is being turned back for more material. The revolution of the cylinder can be by hand-lever or other power. The shovels are fastened adjustably to their supporting-beam, so they can be turned to vary the inclination of the shovels to work different grades of gravel.

The advantage of making my mixing-receptacle a cylinder with a small cut-away portion in the top for facility in loading and unloading lies in the fact that when the eylinder is revolved backward for loading until the loading-chute is below the axis and even with the loading-platform M the are or inward curve of the cylinders side causrs the material dumped into it to drop to the bottom of the cylinder and furnishes no place for lodgment or clogging of the material.

What I claim is- 1. .[n a concrete-mixer, the combination of a platform with a cut-away portion at one end, a frame on said platform adjacentto said cut-away portion, an oscillating drum loosely mounted insaid frame and having an opening in its prripln'ry prev idui with chutes zit-opposite edges thrrrof a slim Hjournaled in 'said frame-and having within said drum shovelsthereon, and means i or rotating said shaft independently of said drum, as and for the purpose set forth.

2. In a concrete-mixer a mixing-drum ferent horizontal rows, as and for the purpose vil'ith shaft liaving thereon 1several 8811:1165 {11f set forth. s'iove s eee'i series extencin aroun t e l I Y 1 shaft aiid having a flat shov el, the other: i d M DEVINB" shovels of the series being curved, and the Attest: 4 shovels of each series being arranged so that Cl D. CAMPBELL, the flat shovels of the several series are in dif- C. A. CAMPBELL. 

